diff --git a/extra/cuda/demos/hello-world/hello-world.factor b/extra/cuda/demos/hello-world/hello-world.factor
index ef410df80b..980f7ba179 100644
--- a/extra/cuda/demos/hello-world/hello-world.factor
+++ b/extra/cuda/demos/hello-world/hello-world.factor
@@ -16,8 +16,7 @@ CUDA-FUNCTION: helloWorld ( char* string-ptr )
         [
             context-device number>string
             "CUDA device " ": " surround write
-            "Hello World!" >byte-array [ - ] map-index host>device &cuda-free
-
+            "Hello World!" utf8 encode [ - ] B{ } map-index-as host>device &cuda-free
             [ { 2 1 } { 6 1 1 } <grid> helloWorld ]
             [ 12 device>host >string print ] bi
         ] with-destructors